Adam lungen



(No Model.) I

A. LUNGEN.

I ELEGTRIG DEVICE.

No. 352,474. PatentedNov. 9, 1886.

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PATENT ADAM LUNGEN, OF NEW YORK, N. Y.

ELECTRIC DEVICE.

SPECIFICATION forming part of Letters Patent No. 352,474, dated November 9, 1886 Application filed January .26, 1886. Serial No. 189,775. (No model.)

To all whom it may concern.-

Be it known that I, ADAM Li'JNGEN, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Fastening Devices, of which the following is a specification.

My invention relates to an improved fastener to be used with electrical devices, especially switches and contact-buttons, and is to be used instead of threaded nuts or pins to hold in place rods, shafts, or bolts, which pass through a frame or base of an electrical device, and upon which are mounted swinging switch-arms or contact-buttons. Heretofore great inconvenicnce has been experienced in putting electrical switches in position, especially upon complicated devices, on account of the difficulty of holding firmly the pivotal pins, which are generally made round,while the threaded nut is being screwed on. It is also difficult to secure parts by a pin passing through a projecting end of the shaft on account of the necessarily small holes and pins which must be used.

My invention consists of a slotted springclip adapted to embrace and retain the projecting end of the rod or shaft, the clip working into an annular slot or under a lateral projection formed in or on the projecting end of the said shaft, the body of the clip being made of spring metal and formed at one end to present inwardly-projecting ends, which, after the clip is placed in position, will bear upon the frame and retain the clip in position.

My device furthermore serves the purpose of compensating for wear of the posts or shrinkage of the base upon which the devices are mounted, for, by reason of the resiliency of the spring-body of the clip, the parts will always be kept tight.

In the accompanying drawings, Figure 1 is a View of my improved fastening-clip in position upon the pivoting-shaft of the electric switch. Fig. 2 isasectional view of an electric switch,showing my improved device in section, holding the several parts in position upon the base or frame; Fig. 3, a face view of the device detached. Fig. 4. is a side view of the same. Figs. 5 and 6 show modifications in the form of the pivoting pin or shaft of the switch. Fig.

7 shows a modification ofthe spring-clip.

The clip Ais a piece of thin spring metal, preferably brass, with a slot, a, extending from one side nearly or quite to the center. In lieu of the slot a extending to the edge of the clip, I may make the device as shown in Fig. 7, wherein a is an elongated opening made wider at one end than at the other.

The clip A is arched or bowed in the direction of the slot, and the end or side B, away from the mouth of the slot, is bent inward toward the concave side of the clip, and sharpened to an edge or made into points, while the two ends 0 0, divided by the slot, are curved outward or toward the convex side of the clip.

In Fig.2, E is a headed pin or shaft, passing through theswitch-arm Fand the frame or base Gof the switch, and projecting from thelatter a short distance from its rear side. Upon the rear end of the pin or shaft E is formed a laterally-projecting shoulder, e, of a size slightly larger than the width of the slot a in the clip, and this head is preferably made by cutting an annular groove in the pin, as shown in Fig. 2. I may, however, form a distinct head, e, upon the rear end of the pin E, as shown in Fig. 5, or permanently fixed therein a laterally-projecting pin, 0. (See Fig. 6.)

The manner of placing my improved fastening in position and the functions of the several parts are as follows The pin E is passed through the switch-arm, a washer, or any other device which it is desired to secure, and passed through the base or frame of the machine. The slot a or a of the device is then made to embrace the projecting end, so that its sides will bear upon the projection formed by the groove 0, head 6, or pin 6 at the rear end of the pin E, and the end B of the clip being prevented from bearing upon the frame, the clip is slid into place, as shown in Fig. 1. If, now, the end B of the clip is allowed to rest upon the frame, it will, by reason of the inwardlyprojecting points and the resiliency of the metal of which the clip is formed, firmly hold all the parts together. Electrical connections may be made with the switches through this clip, either by the metallic conductor directly to the clip or by attaching it to a screw inserted therein, as shown in Fig. i in dotted lines.

I am aware that heretofore nut-locks have been made similar to my device; but I am not and the insulating-frame upon which the deaware that a clip of this description has been vice is mounted. used as the sole means of securing a bolt, rod, Signed at New York, in the county of New or shaft in position. York and State of New York, this 31st day of 5 What I claim is October, A. D. 1885.

The herein-described fastening-clip, having the spring-body A, slot a, inwardly-projecting I ADAM LUNGEN' edge B, and outwardly-curved end 0, in com- Witnesses:

bination with a shoulder or projection upon JACOB FELBEL,

10 the end of the rod, shaft, or bolt to be secured, ANDREW W. STEIGER, 

